Skyherb can provide luteolin, apigenin, phloretin, phloridzin, betulin in large quantity with high quality. Skyherb is a professional manufacturer of herb extract in China. Our competitive products are as follow: Peanut Shell Extract Luteolin 80% Luteolin 90% Luteolin 95% Luteolin 98% Chamomile Extract Apigenin 1% Apigenin 80% Apigenin 90% Apigenin 95% Apigenin 98% Apple root extract phloridzin 40% phloridzin 60% phloridzin 80% phloridzin 90% phloridzin 98% phloretin 80% phloretin 90% phloretin 95% phloretin 98% Betulin betulin 70% betulin 80% betulin 90% Rhodiola rosea extract rosavin 1%~5% rosavins 2%~5% salidroside 1%~3% Grape seed extract proanthocyanidin 95% polyphenol90%/ OPCs80%/ Monomer5% polyphenol95%/ OPCs85%/ Monomer10% Pine bark extract proanthocyanidin 95% 5-HTP Pls visit our website for more products info. Thanks for your time and looking forward to work with you. Skyherb